During chest auscultation, the nurse hears a quiet murmur immediately upon placing the stethoscope on the client's chest. The nurse interprets this as which grade?

A. I: A grade I murmur is very faint and may not be heard immediately without careful listening. The description of a murmur heard immediately upon placing the stethoscope indicates it is a grade I. B. X: There is no grade X in the standard grading scale for heart murmurs. C. II: A grade II murmur is quiet but easily heard with a stethoscope and would generally be more audible than described. D. III: A grade III murmur is moderately loud and would be heard without difficulty. The description suggests a quieter murmur.